Polishing machine



I E. P. IVIcCLURE.

PoLlsHlNG MACHINE.

APPLICTION FILED OCT. 27, 1919.

Patented Aug. 15, 1922.-

5 SHEETS-SHEET l.

E. P. IVlcCLURE.

PoL|sH|NG MACHINE.

APPLICATION FILED OCT. 27, 1919' 1,425,666.- Patented@ 15,1921

5 SHEETS-SHEET 2.

fave/afb? E'. P. lVlcCLUHE.

POLISVHING MACHINE. APPLICATION FILED ocT. 21 1919.

Patented Aug.. 15, 1922.'

5 SHEETS-SHEET 3.

. E. P. McCLURE.

- PGLISHING MACHINE.

APPLlcATloN FILED ocr. 27. :919.

Patented Aug. 15, 19227 5 SHEETS-SHEET 4.

, tightened when the adjustmentfis made to clamp the plate securely to the frame mem" ber.

The bearing plate leis formed with journal bearings 11 in which is mounted asplndle 12, to which is secured at the left hand side of the machine, a pulley 13, and also, at the right lia-ndside, a set of spaced bufiing disks 14, each constructed in the usual man ner of anumber .of plies of fibrous or other suitable material securedtogether.. In the present instance these disks arev separated from` each other by the laterally extending portion of the hubs 1.5y of the hubs to which the disks are secured, and the hubsandconf netted disks are removable and interchangeable in order that disks Cif/different diameters may. be assembled tofconform to: the peripheral .surface ofy an article which. is not cylindrical, but of varying diameter.,

Uponthe top `of ,they frame member 2. is

- arranged 'a bearing'- platej lr6., similarin conf struction and arrangement tothe plate .45,

but inountedto be slidingly adj usted fore and aftto the machine in ay horizontal plane, by

means of adjusting screw 17, and secured in adjusted position by clamping screwsl 18., similar in construction to the adjusting screw 6 and elampingserews- 10 before'jmen tioned. Journa-led in bearings carried by this top bearing plate 16 is a spindle '19v to. which is secured a` pulley 20Laid `aslet of buiiing disks 21 which are similar to the disks lty but; are staggered or offset :with re'-A spect to them, as shown in-Figs, 3 and 5.l

The two sets of butiing wheels are. ar-` ranged toy be. rotated by means @it a belt 22 engaging a. suitable drivingpulley v@not shown) whichengages-thepulleys; 13. and 2O vand an intermediate adjustably -.mounted idler pulley 253, As-shownT-see Figs. 2 and 5-, this idler take-up pulley is rotanibly mounted upon a stub shaft ,24 secured to aplate. 25 whichis slid-ably mounted in a.

i article to be polished is-presented to the buii'- ing wheels will now be describedj As sh own in Figs. 1, 2 and 3,' the base;` member 1 is farmed with hinge memberst) bored to rece-ive a pintle 31 upon which is pivotally mounted hinge members .32 for-med, at the.

bottom of a swinging frame 33A (see Fig, et),

consisting of opposite rearwardly curved side members. E34-34@ which at their-top, and rearjare connected to vertical end portions ,3Q-3532, respectively, and of top and bottom strength. The' swinging frame is swungv backwards andforwards upon its pivot tol and from Lworking position by means of a hand'wheel 37 and connected screw shaft 38 having swiveled connection at its rear end with a block 2,9 pivoted tothe frame meinber 2. and engaging an internallythreaded block 40 pivoted .upon the side number 34 of the frame. 1 i g;

At the left hand side of the machine and at the top of the side member '34a the frame is for-med with a bracket 41 upon wnicnls mounted a small electric motor 42, which may be of any lsuitable construction provided with starting switch, and having the proper capacity to drive the work holderand perform the work for which the machine is designed. i The mo'torshaft is .coluiected with a worm i3 which 'drives-a worm. gear ill mounted upon a hollow stub shaft 45 rotatably` `mounted in y a hubbearing 46 formed in the frame member 34a atothe rear; side of the bracket 41, nuts if? and 48 serving 'to hold the shaft. in its bearing.v Theworkholding shaft t9 (whic'lnas. later will be explained, has. b'othan` axial and a rotarymovemont) .makes splined engagement with the. bore ofthe hollow stub shaft 4,5 of the. worm wheel-see Fig. 6,--and also rotatably and slidably engages a hub bearingl e9 formed at the front endof the curvedipor-tion. of

the side member 311 of the .frame Slidably mounted in bearings 50 and 50a at the top of the vertical end poi'tiens 3.5 and 351? respectively of the side members of.

the swinging frame isa shaft 51 eXtBIlding another transverse bore to engage the shaft 49, and also.' a double pinion having two gears 525 and 56 securedV v.to a single hab.; The work-holding :shaft also hasfsecured to' it two collars 57 and` 5.8, the collar 5.7 abutting against the lower end of the cross-bar .54., and the`collar58 abutting againstay cir-v cular cam. 59 whichis integral with .or ysel cured to a gear 60 rotatably mounted on the shaft L19 vand meshing with the gear 5G of the double pinion before mentioned. cam 59. is arranged to cooperate with. a Cain roller 61 pivotally mounted uponalug 62 projecting laterally troni the side member 3d of the swinging frame.. Confined between.

the crossbarv .5e-and the vgearwheel; Qi-si a pinion 63 meshing with the gear 55 ofthe double pinion and having splinedconnection with the shaft. 49a. It is.manifest that through rotation of the. motor the worin gear wheel 4.4 will be rotated, and through The v and cross-bar 54y andtheV the splined connectionofsuch: Wheel the' shaft 49 andthe splined connection ofsuch shaft With'thezpinijon 68-f-the latter, Willfbe rotatedf and transmit rotary motion :tof the ca'mg59 through'v the double` pinion` 4:554-456 and .the pinion 60. i Since the i collars` and 58secured to the shaft 49 coninethe cam x59 tweenthem, and the collars 52 and 53 con ne the cross-bar .andA .doublev pinion, y the rotation lof the cam compelsv longitudinal movement of the shafts .49 fand/:51 asa unit. .i To theouter endet thcvsha-ft;5l'is:secured an arm, which axiallyf ofithe :Work-holding shaft is bored toreceive aybushing 65 threaded l internallyto en', 1;age` a *clamping ,screw "66 operated through a `handvvvheel 67. VThisv clamping screw is bored to receive thestub shaft 68 ofa relativelyzgmovable clamping member; or foot stock 69- -Which isv adapted to cooperate with -a relatively-*fixed clamping head 'or head stock 7()Y secured to the' end of the work-holding sha-tt to vclamp between.

them the bottom` of a. pan, kettle, lor; other article to i be .polished by s 'the abutting disk's.

A supplementary.; supporting and. centering member in the form of adisln72is provided,

adapted to be set so as to ,engage'the'openf 0r cup, and supportit.dnringfthe.polishingv loperation..:,Betweens-Qtheendfof the sti`1b` shaft 68 andthe end ofthe-.socket inxvvhich such shaftk is rotatably-.mounted is inter- .posed a thrust bearing1 71/ftov takenp the stress of the .clampingscrewandy minimize y friction.

` land k.,camv.j59,fso thateach'traverseof Work holding shaft Willifbeginvviththelarticleoccupyingia'n angularrel-ation with re.

The relationshipvo'f the gear Wheels'yv," 55', 5.6 and .60 iss'uch` that.a;1revolution-of the #Work-holding shaft Willl not be anjexact multiple of a revolutionfoiIV the gear'vvheel spect to the position occupied-at the beginning', of thel preceding. traverse, linv forde-r to avoid having the bu-iiing, disksfollovvithe same spiral path at each reciprocationfof the article axially. For instance,Y 'the gearwheel y63 may `have forty-eight teethy-the gear wheel seventyJsix,I the gear.;y wheel;` 56 fortyeight, and the` gearlwheelr() seventy-v six teeth; in .which casetheD beginningrof y y each reciprocation'ofgthe cam-59-and connec'ted 'partswilloccur 14e/361 of` a'revolution of the ,shaft 40, `vand' articleA rotated thereby away from the,positionfoccnpied; by the Y. shaft at the ,beginning of th ef .prer traverse." fw." u@ It will be understoodl that in thepractical use 4'of 'my machine,. a'f'fcnsiderablenumber of similar articles inlone 'lot Will nsuallybe polished successivelyi and the machine is set to the particular articlebyi-setringstlo: the' y shafts lQzand, 19 butli-ng ,disks .(-identiied kon thejdrawingsjby theH number .14E-Land, 21,;v 1e

pinions lying" be? diameterandspacing;7V and `making such ad! :spectivelylof' appropriate""number and.'`

justmentsfv voit-'the i bearing plates 4 andql,

and the idler pulley-23 may bewneeded to causetliei bnfling Whileto properly,l engagey the" outer `surface of^-thearticle )when .clampedl axially .betwenathe 'clamping heads .y l. 'y' l i" 69 and 70.*.; If'the article is cylindrical, as

shownfthe buling disks Willfallbe tof-the" l same, diameter, but--if .the exterior is conical orcurved, or more orflessirregulariontline in"y diametricalfsection.. the ,disks `vvill bey voi'.l

such .diameter and so :spaced and ,arranged .as to conformtofthe. gene-ral contour ofthe" article. rlhe yielding` Icharacter and quality ot the butiing disksjisl snchthatiduring the longitudinal reciprocation` vof `the article Withthe:,Work-hol :lingv shaft the ldisks will .:tollowvthesurface-lot:the' article and con?.

forni to minor irregularitiesnor variationsinl yits-shape,y and Will effectively polish every y lpartthereof exposed ytojtlie disks'. The re.l 4

quired adjustments 'of' o the' various".` fmem-v bers' having once beenv mada". the swingingframe 33 may beshl-fted to randy-from Work-A ingl ,position'by means'of' the hand Wheel' and; screw? :shaft ,3l-8v -toyperniitf successiveziar y ticle's' tof be L1 secured to` fthev Work-holding A shaft, brought tofvvo'rkingy position, and then: afterf the, polishingv operation. hasta'ken place. `The :polishing disks are 'preferably continuously drivem but. the --motor iis,vr either provided with a convenient switchby means place,y shifted` tol position vOfnon-engagem'ent to permit; thenext articlegtogbe secured l in@ vention may be employed rfor grinding .'cy-y lindrical or. approximately cylindrical; ar-l Aticlesl of metah Woodforf. othermaterialfand that ,in'someccases it maybe desirable 'to use butone series vof abrading members,- or. it

may be .unnecessary toc'ause the'fWork-holde" j f.

ing shaftgto reciprocate longitudinally; I therefore donot limit my claims beyondfthe elements particularlv recited to the. entire and specific machine. described. ,y l, `vI c lalm'ggy f ltrIn ,a machine for fy .i

symmetrical aboutqa` radial line,l awvork holdingfmemberarranged to-f engage an article; and; rotate it a plurality offvrotatable spindles-parallel with) thelaxis of rotation of lthe articlepand.indifferent radialjplanesbl` l p said spindles beingeach wequifpped l with polishing. disksandthe disks ofwthefdiifen l ent sets beingstaggeredWithrespect lto .each

'A other,I and-means for automaticallyreciproe i 'l eating-said Work-'holding meansfaXia'l-ly.l

symmetrical about an axial line a shaft equippedwithr a Work-holding member arrangedto engageand rotate the article to be polished, a horizontally adjustable bearing plate and a spindle equipped With polishing dislrs `journaled in said plata-avertically adjustable bearing plate and a'spindle equipped with polishing dislrs journaled in said last mentioned plate; said spindles being'arranged parallel With said shaft and adjustable radially thereof. y

3. linv a machine for polishing `articles symmetrical about `an axial line, a rotatable sliaft-moiinted to swing transversely of itsY axis through parallel .positions into and out of working position, said shaft beingequipped with Work holding means arranged to engageand rotatethe article to be polished, a

. plurality7 of rotatable spindles parallel rWith and 'arranged angul'arly about the axis of saidrotatable shaft vrhen in its Working position, said spindles being equipped With polishing members having their peripheries arranged to simultaneously contact said article,; and means for' swinging said shaft transveresly.y

e. A machine according to claim 3" in 'Whichrthe rotatable shaftais journaled 'in a pivoted frame.. f

5. A machine according to Vclaim 3v in which therotatable shaft isl journaled in a pivioted frame vand 'af motor arranged to rotate said shaft is mountedon said frame. ,GQA machine according to claimA 3 in which the said shaft Ais slidably androtatably mounted in a reciprocating frame.

7. Ak machine "according to'claim 3 in which said shaft is slidably and rotatably mounted in a reciprocatingframe'and motor arranged to rotate and reciprocate said` shaft is mounted on said frame.

8.*'AV ymachine according to claim 2 in Which Vsaid spindles 'are equipped 4With pulleys and driven by a belt and a take-'up idler pulley isadjustably mounted -to engage lafloop of said'belt intermediate said first-mentioned pulleys.

91 ln a 'machine of the character described., a driving pinion having a tubular hub journaled in thelmachine frame, Work-holdring means including a shaft mounted to slide in said tubular hub and havingy splined'` connections therewith, said shaft being equipped with a Work-holding member, a

1 circular cam rotatably and' non-slidablv mounted on said shaft, reducing gearing including a pinion nonfrotatably secured yto said shaft and having geared connection Withsaidcircular cam, and a stationary cam member'cooperating with said circular cam.r

10'. Ina machine of the character described, Work-*holding mechanism includingv a-shaft moun-ted toV rotate and slide longitudinally and equipped With a `Workholding es;

member, driving means having splined con-r igaaagcee nection with said shaft, a second shaft slid'- ably mounted vparallel with lsaid first-mentioned shaft,l reducing gearing including a pinion nonerotatably secured `to'said first'- mentioned'. shaft r and pinions Arotatably mounted on said second mentioned shaft and a pinion 'rotatably mounted on said iirst-inentioned shaft, ra circular cam secured to said last-mentioned pinion, av stationary cam member .cooperating with said circular cam, and means for preventing relative longi tudinal movement lof-said shafts.

11. -In a machine of ythe character described, Work-holding mechanism vaccording to claim 10 in Vwhich saidcircularcamfis-formj# ed upon a -hubintegral with the pinion rotatably mounted on sai-d first-mentioned shaft. .Y y

- 12.1161 ar machine'of they characterl described, Work-holding mechanism according to claim 10 in'whichv the means foi-prevent-y ing relative longitudinal' movement of the shafts comprise a cross-bar :rotatably engag-v ing the first-mentioned shaft, a pair-of col# lars secured to said first mentionedshaft on 'confining the said crossarm and the pinionsand `cam:mounted'on such shaft. and' a' second pair of' collars` secured to` said second:-y

mentioned shafti vconfiningthe pinions mounted onsueh--shaftgAv p f 13. In ay machine of lthe `charactrnc described, livOrk-holding mechanism according to claim l() inwvhich the-pinions-on said second-mentioned*v shaft are ,mounted j on a v single hub rotatably engaging-such shaft and mesh respectively With the .pinion nonrotatablyv mounted on saidff'rrstmentioned shaft and the pinion rotatably mounted ony suchshaft. v

14. In a machine 'of lthe character described, W0rlr-holding mechanism accordingr to claim 10 in `which the gearingratio effects member atvthe beginning' of each longitudinal traverse withl respect'to the last-previous positionat such point.

15. In a` machine' ofv thec-haracter de-v scribed, Work-holding `mech anism 'including a shaft mounted to rotate and slide longitudinally and equipped lWith awvorli-holding member7 driving means having splined connectionwith saidl shaft, a second shaft! slidably mounted parallel With said first-mentioned shaft, a train of gearing on said firstthe' character devangular displ'acementof the Work-holding to claim 15 in which the clamping head on sald first mentioned shaft is fixed to such shaft and the clamping head mounted in said arm is movable in respect to such'arm. 17. In a machine of the character de` scribed, work-holding mechanism according to claim l5 in which the clamping head on said first mentioned shaft is relatively fixed and the clamping head mounted in said arm is formed with a stem rotatably `enga-ging a screw shaft making threaded engagement with such arm.

18. In a machine of the character described, work-holding mechanism comprising a shaft mounted to Arotate and slide longitudinally and equipped with a head stock, a second shaft slidably mounted i parallel with said first mentioned shaft and equipped with a foot-stock, a cross-arm engaging said second shaft and secured against longitudinal movement thereon, said cross-arm rotatably engaging said first mentioned shaft, and means on said first mentioned shaft cooperating with said cross-arm for-takingup the thrust between said head stock and footf stock.

19.\In a machine ofthe character described, means for rotating and axially reciprocating the article to be polished, comprising a driven shaft mounted to rotate and slide longitudinally,` said. shaft being equipped with ahead stoel; asecond.y shaft i.

slidably mountedV parallel withsaid first mentioned shaft and equippedv with a footi stock,V a cross-arm connectingA said shafts and rotatably engaging said first mentioned Vshaft,` ymeans on said two shafts cooperating with said cross-arm for taking upthrust between said head lstock land foot-stock, land means connectedvwith saidv first` mentioned prislngv a driven shaft mounted to rotate and slide'` longitudinally,

mentioned shaft "and equipped 'i with a footand 'rotatably engaging ysaid first mentioned shaft, means' on said ytwo shafts cooperating with saidoross-arm for' taking up thrustbetween said head stock and foot-stock,` and saidf` shaft being equipped with a head stock, a second 'shaft slidably mounted parallel with. said first .y

50i stock, a cross-arm connecting 'said shafts "I" means connected vwithsaid first mentioned f shaft `and including .reducing f gearing mounted on said shafts and a circular-cam rotated by said gearingy for .reciprocating ,t

said shafts in unison.

' ELMERRMCGLRE p 'y 

